Fuel Injection Timer

Using strobe light and Synchronizer (5783-001), install the synchronizer to pump housing so that synchronizer lever is in contact with plunger tappet. Position strobe light so degree wheel on tester will be illuminated when light is turned on.

Fig 1: Exploded View of Fuel Injection Timer
Courtesy of NOT AVAILABLE

Operate pump at different speeds and record degrees advance. See 1976-77 or 1978-79 FUEL INJECTION TIMER SPECIFICATIONS table. If advance is not to specifications, disassemble timer and adjust spring force by increasing or decreasing the thickness of adjusting shims, or replace spring. See Fig 1.

1976-77 FUEL INJECTION TIMER SPECIFICATIONS

RPM	Degrees Advance
500	0
700	0.5-1.5
1100	2.0-3.5
1500	4.5-5.0
1800	7.0-8.0

1978-79 FUEL INJECTION TIMER SPECIFICATIONS

Application

Degree BTDC Advance

Base

7.5(⁽¹⁾ 15)

Starting

⁽¹⁾ 20

High Speed

⁽¹⁾ 35

⁽¹⁾	Engine crankshaft angle.

INJECTION PUMP SPECIFICATIONS

Application		Specification
Pump Oil Capacity
	SD22	80 cc
	SD33	180 cc
Governor Oil Capacity
	Vacuum	3 or 4 Drops
	Mechanicl	200 cc
Injector Opening Pressure		1422.5 psi (100 kg/cm² )
Feed Pump Pressure		25.6 psi (1.8 kg/cm² )

TIGHTENING SPECIFICATIONS

Application		Ft. Lbs. (kgm)
Injection Pump
	Delivery Valve Holder	22-25 (3-3.5)
	Air Bleed Screw	15-22 (2-3)
	Tappet Lock Nut	43-51 (6-7)
Timer
	Round Nut	43-51 (6-7)
	Lock Nut	72-130 (10-18)
Nozzle
	Nozzle Nut	72-87(10-12)
	Nozzle Holder Nut	51-58 (7-9)